Yes there is. The 16 year old is a minor while the 19 year old is an adult. They can date, but not do anything more because that can be considered rape.
Yes.
Varies by state, check your local laws. (dating is never against the law, but sex might be)
No. It isn't a good idea, but there is no law against it.
No, there are no laws about dating. In most places that age of consent for sexual activity is 16.
That is up to the parents to decide since there are no laws for dating, just for sex.
There is no law against 'dating', but any sexual contact (even a passionate kiss) could lead to charges of statutory rape against the 23 year old. And no parent would allow such a date to take place.
From what I understand, if you don't have sexual contact with this person, it isn't against the law.
There are no laws about dating. And the age of consent to sexual activity is 16 in Washington state.
There are no laws about dating. However, there is only one reason a high school graduate/senior would go out with someone 4 years younger than they are, and that could be illegal.
yep
No sex. Sorry!
It is certainly not a good idea. While there are no laws regarding dating, there are laws against any sexual contact. And a 16 year old accused of something with an 11 year old is going to have terrible consequences.